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quectel-CM/udhcpc.c

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/******************************************************************************
@file udhcpc.c
@brief call DHCP tools to obtain IP address.
DESCRIPTION
Connectivity Management Tool for USB network adapter of Quectel wireless cellular modules.
INITIALIZATION AND SEQUENCING REQUIREMENTS
None.
---------------------------------------------------------------------------
Copyright (c) 2016 - 2020 Quectel Wireless Solution, Co., Ltd. All Rights Reserved.
Quectel Wireless Solution Proprietary and Confidential.
---------------------------------------------------------------------------
******************************************************************************/
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/types.h>
#include <net/if.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <endian.h>
#include "util.h"
#include "QMIThread.h"
static int ql_system(const char *shell_cmd) {
dbg_time("%s", shell_cmd);
return system(shell_cmd);
}
static void ifc_init_ifr(const char *name, struct ifreq *ifr)
{
memset(ifr, 0, sizeof(struct ifreq));
strncpy(ifr->ifr_name, name, IFNAMSIZ);
ifr->ifr_name[IFNAMSIZ - 1] = 0;
}
static void ql_set_mtu(const char *ifname, int ifru_mtu) {
int inet_sock;
struct ifreq ifr;
inet_sock = socket(AF_INET, SOCK_DGRAM, 0);
if (inet_sock > 0) {
ifc_init_ifr(ifname, &ifr);
if (!ioctl(inet_sock, SIOCGIFMTU, &ifr)) {
if (ifr.ifr_ifru.ifru_mtu != ifru_mtu) {
dbg_time("change mtu %d -> %d", ifr.ifr_ifru.ifru_mtu , ifru_mtu);
ifr.ifr_ifru.ifru_mtu = ifru_mtu;
ioctl(inet_sock, SIOCSIFMTU, &ifr);
}
}
close(inet_sock);
}
}
static int ifc_get_addr(const char *name, in_addr_t *addr)
{
int inet_sock;
struct ifreq ifr;
int ret = 0;
inet_sock = socket(AF_INET, SOCK_DGRAM, 0);
ifc_init_ifr(name, &ifr);
if (addr != NULL) {
ret = ioctl(inet_sock, SIOCGIFADDR, &ifr);
if (ret < 0) {
*addr = 0;
} else {
*addr = ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr;
}
}
close(inet_sock);
return ret;
}
static short ifc_get_flags(const char *ifname)
{
int inet_sock;
struct ifreq ifr;
int ret = 0;
inet_sock = socket(AF_INET, SOCK_DGRAM, 0);
if (inet_sock > 0) {
ifc_init_ifr(ifname, &ifr);
if (!ioctl(inet_sock, SIOCGIFFLAGS, &ifr)) {
ret = ifr.ifr_ifru.ifru_flags;
}
close(inet_sock);
}
return ret;
}
static int ql_raw_ip_mode_check(const char *ifname) {
int fd;
in_addr_t addr;
char raw_ip[128];
char shell_cmd[128];
char mode[2] = "X";
int mode_change = 0;
ifc_get_addr(ifname, &addr);
if (addr)
return 0;
snprintf(raw_ip, sizeof(raw_ip), "/sys/class/net/%s/qmi/raw_ip", ifname);
if (access(raw_ip, F_OK))
return 0;
fd = open(raw_ip, O_RDWR | O_NONBLOCK | O_NOCTTY);
if (fd < 0) {
dbg_time("%s %d fail to open(%s), errno:%d (%s)", __FILE__, __LINE__, raw_ip, errno, strerror(errno));
return 0;
}
read(fd, mode, 2);
if (mode[0] == '0' || mode[0] == 'N') {
dbg_time("File:%s Line:%d udhcpc fail to get ip address, try next:", __func__, __LINE__);
snprintf(shell_cmd, sizeof(shell_cmd), "ifconfig %s down", ifname);
ql_system(shell_cmd);
dbg_time("echo Y > /sys/class/net/%s/qmi/raw_ip", ifname);
mode[0] = 'Y';
write(fd, mode, 2);
mode_change = 1;
snprintf(shell_cmd, sizeof(shell_cmd), "ifconfig %s up", ifname);
ql_system(shell_cmd);
}
close(fd);
return mode_change;
}
static void* udhcpc_thread_function(void* arg) {
FILE * udhcpc_fp;
char *udhcpc_cmd = (char *)arg;
if (udhcpc_cmd == NULL)
return NULL;
dbg_time("%s", udhcpc_cmd);
udhcpc_fp = popen(udhcpc_cmd, "r");
free(udhcpc_cmd);
if (udhcpc_fp) {
char buf[0xff];
buf[sizeof(buf)-1] = '\0';
while((fgets(buf, sizeof(buf)-1, udhcpc_fp)) != NULL) {
if ((strlen(buf) > 1) && (buf[strlen(buf) - 1] == '\n'))
buf[strlen(buf) - 1] = '\0';
dbg_time("%s", buf);
}
pclose(udhcpc_fp);
}
return NULL;
}
#define USE_DHCLIENT
#ifdef USE_DHCLIENT
static int dhclient_alive = 0;
#endif
static int dibbler_client_alive = 0;
void ql_get_driver_rmnet_info(PROFILE_T *profile, RMNET_INFO *rmnet_info) {
int ifc_ctl_sock;
struct ifreq ifr;
int rc;
int request = 0x89F3;
unsigned char data[512];
memset(rmnet_info, 0x00, sizeof(*rmnet_info));
ifc_ctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
if (ifc_ctl_sock <= 0) {
dbg_time("socket() failed: %s\n", strerror(errno));
return;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifr.ifr_name, profile->usbnet_adapter, IFNAMSIZ);
ifr.ifr_name[IFNAMSIZ - 1] = 0;
ifr.ifr_ifru.ifru_data = (void *)data;
rc = ioctl(ifc_ctl_sock, request, &ifr);
if (rc < 0) {
dbg_time("ioctl(0x%x, qmap_settings) failed: %s, rc=%d", request, strerror(errno), rc);
}
else {
memcpy(rmnet_info, data, sizeof(*rmnet_info));
}
close(ifc_ctl_sock);
}
void ql_set_driver_qmap_setting(PROFILE_T *profile, QMAP_SETTING *qmap_settings) {
int ifc_ctl_sock;
struct ifreq ifr;
int rc;
int request = 0x89F2;
ifc_ctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
if (ifc_ctl_sock <= 0) {
dbg_time("socket() failed: %s\n", strerror(errno));
return;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifr.ifr_name, profile->usbnet_adapter, IFNAMSIZ);
ifr.ifr_name[IFNAMSIZ - 1] = 0;
ifr.ifr_ifru.ifru_data = (void *)qmap_settings;
rc = ioctl(ifc_ctl_sock, request, &ifr);
if (rc < 0) {
dbg_time("ioctl(0x%x, qmap_settings) failed: %s, rc=%d", request, strerror(errno), rc);
}
close(ifc_ctl_sock);
}
void ql_set_driver_link_state(PROFILE_T *profile, int link_state) {
char link_file[128];
int fd;
int new_state = 0;
snprintf(link_file, sizeof(link_file), "/sys/class/net/%s/link_state", profile->usbnet_adapter);
fd = open(link_file, O_RDWR | O_NONBLOCK | O_NOCTTY);
if (fd == -1) {
if (errno != ENOENT)
dbg_time("Fail to access %s, errno: %d (%s)", link_file, errno, strerror(errno));
return;
}
if (profile->qmap_mode <= 1)
new_state = !!link_state;
else {
//0x80 means link off this pdp
new_state = (link_state ? 0x00 : 0x80) + profile->pdp;
}
snprintf(link_file, sizeof(link_file), "%d\n", new_state);
write(fd, link_file, sizeof(link_file));
if (link_state == 0 && profile->qmapnet_adapter && strcmp(profile->qmapnet_adapter, profile->usbnet_adapter)) {
size_t rc;
lseek(fd, 0, SEEK_SET);
rc = read(fd, link_file, sizeof(link_file));
if (rc > 1 && (!strncasecmp(link_file, "0\n", 2) || !strncasecmp(link_file, "0x0\n", 4))) {
snprintf(link_file, sizeof(link_file), "ifconfig %s down", profile->usbnet_adapter);
ql_system(link_file);
}
}
close(fd);
}
static const char *ipv4Str(const uint32_t Address) {
static char str[] = {"255.225.255.255"};
uint8_t *ip = (uint8_t *)&Address;
snprintf(str, sizeof(str), "%d.%d.%d.%d", ip[3], ip[2], ip[1], ip[0]);
return str;
}
static const char *ipv6Str(const UCHAR Address[16]) {
static char str[64];
uint16_t ip[8];
int i;
for (i = 0; i < 8; i++) {
ip[i] = (Address[i*2]<<8) + Address[i*2+1];
}
snprintf(str, sizeof(str), "%x:%x:%x:%x:%x:%x:%x:%x",
ip[0], ip[1], ip[2], ip[3], ip[4], ip[5], ip[6], ip[7]);
return str;
}
//#define QL_OPENWER_NETWORK_SETUP
#ifdef QL_OPENWER_NETWORK_SETUP
static const char *openwrt_lan = "br-lan";
static const char *openwrt_wan = "wwan0";
static int ql_openwrt_system(const char *cmd) {
int i;
int ret = 1;
char shell_cmd[128];
snprintf(shell_cmd, sizeof(shell_cmd), "%s 2>1 > /dev/null", cmd);
for (i = 0; i < 15; i++) {
dbg_time("%s", cmd);
ret = system(shell_cmd);
if (!ret)
break;
sleep(1);
}
return ret;
}
static int ql_openwrt_is_wan(const char *ifname) {
if (openwrt_lan == NULL) {
system("uci show network.wan.ifname");
}
if (strcmp(ifname, openwrt_wan))
return 0;
return 1;
}
static void ql_openwrt_setup_wan(const char *ifname, const IPV4_T *ipv4) {
FILE *fp = NULL;
char config[64];
snprintf(config, sizeof(config), "/tmp/rmnet_%s_ipv4config", ifname);
if (ipv4 == NULL) {
if (ql_openwrt_is_wan(ifname))
ql_openwrt_system("ifdown wan");
return;
}
fp = fopen(config, "w");
if (fp == NULL)
return;
fprintf(fp, "IFNAME=\"%s\"\n", ifname);
fprintf(fp, "PUBLIC_IP=\"%s\"\n", ipv4Str(ipv4->Address));
fprintf(fp, "NETMASK=\"%s\"\n", ipv4Str(ipv4->SubnetMask));
fprintf(fp, "GATEWAY=\"%s\"\n", ipv4Str(ipv4->Gateway));
fprintf(fp, "DNSSERVERS=\"%s", ipv4Str(ipv4->DnsPrimary));
if (ipv4->DnsSecondary != 0)
fprintf(fp, " %s", ipv4Str(ipv4->DnsSecondary));
fprintf(fp, "\"\n");
fclose(fp);
if (!ql_openwrt_is_wan(ifname))
return;
ql_openwrt_system("ifup wan");
}
static void ql_openwrt_setup_wan6(const char *ifname, const IPV6_T *ipv6) {
FILE *fp = NULL;
char config[64];
int first_ifup;
snprintf(config, sizeof(config), "/tmp/rmnet_%s_ipv6config", ifname);
if (ipv6 == NULL) {
if (ql_openwrt_is_wan(ifname))
ql_openwrt_system("ifdown wan6");
return;
}
first_ifup = (access(config, F_OK) != 0);
fp = fopen(config, "w");
if (fp == NULL)
return;
fprintf(fp, "IFNAME=\"%s\"\n", ifname);
fprintf(fp, "PUBLIC_IP=\"%s\"\n", ipv6Str(ipv6->Address));
fprintf(fp, "NETMASK=\"%s\"\n", ipv6Str(ipv6->SubnetMask));
fprintf(fp, "GATEWAY=\"%s\"\n", ipv6Str(ipv6->Gateway));
fprintf(fp, "PrefixLength=\"%d\"\n", ipv6->PrefixLengthIPAddr);
fprintf(fp, "DNSSERVERS=\"%s", ipv6Str(ipv6->DnsPrimary));
if (ipv6->DnsSecondary[0])
fprintf(fp, " %s", ipv6Str(ipv6->DnsSecondary));
fprintf(fp, "\"\n");
fclose(fp);
if (!ql_openwrt_is_wan(ifname))
return;
if (first_ifup)
ql_openwrt_system("ifup wan6");
else
ql_openwrt_system("/etc/init.d/network restart"); //make PC to release old IPV6 address, and RS new IPV6 address
#if 1 //TODO? why need this?
if (openwrt_lan) {
int i;
char shell_cmd[128];
UCHAR Address[16] = {0};
ql_openwrt_system(("ifstatus lan"));
for (i = 0; i < (ipv6->PrefixLengthIPAddr/8); i++)
Address[i] = ipv6->Address[i];
snprintf(shell_cmd, sizeof(shell_cmd), "ip route del %s/%u dev %s", ipv6Str(Address), ipv6->PrefixLengthIPAddr, ifname);
ql_openwrt_system(shell_cmd);
snprintf(shell_cmd, sizeof(shell_cmd), "ip route add %s/%u dev %s", ipv6Str(Address), ipv6->PrefixLengthIPAddr, openwrt_lan);
ql_system(shell_cmd);
}
#endif
}
#endif
void udhcpc_start(PROFILE_T *profile) {
char *ifname = profile->usbnet_adapter;
char shell_cmd[128];
ql_set_driver_link_state(profile, 1);
if (profile->qmapnet_adapter) {
ifname = profile->qmapnet_adapter;
}
if (profile->rawIP && profile->ipv4.Address && profile->ipv4.Mtu) {
ql_set_mtu(ifname, (profile->ipv4.Mtu));
}
if (strcmp(ifname, profile->usbnet_adapter)) {
snprintf(shell_cmd, sizeof(shell_cmd), "ifconfig %s up", profile->usbnet_adapter);
ql_system(shell_cmd);
if (ifc_get_flags(ifname)&IFF_UP) {
snprintf(shell_cmd, sizeof(shell_cmd), "ifconfig %s down", ifname);
ql_system(shell_cmd);
}
}
snprintf(shell_cmd, sizeof(shell_cmd), "ifconfig %s up", ifname);
ql_system(shell_cmd);
if (profile->ipv4.Address) {
if (profile->PCSCFIpv4Addr1)
dbg_time("pcscf1: %s", ipv4Str(profile->PCSCFIpv4Addr1));
if (profile->PCSCFIpv4Addr2)
dbg_time("pcscf2: %s", ipv4Str(profile->PCSCFIpv4Addr2));
}
if (profile->ipv6.Address[0] && profile->ipv6.PrefixLengthIPAddr) {
if (profile->PCSCFIpv6Addr1[0])
dbg_time("pcscf1: %s", ipv6Str(profile->PCSCFIpv6Addr1));
if (profile->PCSCFIpv6Addr2[0])
dbg_time("pcscf2: %s", ipv6Str(profile->PCSCFIpv6Addr2));
}
#if 1 //for bridge mode, only one public IP, so do udhcpc manually
if (ql_bridge_mode_detect(profile)) {
return;
}
#endif
//because must use udhcpc to obtain IP when working on ETH mode,
//so it is better also use udhcpc to obtain IP when working on IP mode.
//use the same policy for all modules
#if 0
if (profile->rawIP != 0) //mdm9x07/ec25,ec20 R2.0
{
if (profile->ipv4.Address) {
unsigned char *ip = (unsigned char *)&profile->ipv4.Address;
unsigned char *gw = (unsigned char *)&profile->ipv4.Gateway;
unsigned char *netmask = (unsigned char *)&profile->ipv4.SubnetMask;
unsigned char *dns1 = (unsigned char *)&profile->ipv4.DnsPrimary;
unsigned char *dns2 = (unsigned char *)&profile->ipv4.DnsSecondary;
snprintf(shell_cmd, sizeof(shell_cmd), "ifconfig %s %d.%d.%d.%d netmask %d.%d.%d.%d",ifname,
ip[3], ip[2], ip[1], ip[0], netmask[3], netmask[2], netmask[1], netmask[0]);
ql_system(shell_cmd);
//Resetting default routes
snprintf(shell_cmd, sizeof(shell_cmd), "route del default gw 0.0.0.0 dev %s", ifname);
while(!system(shell_cmd));
snprintf(shell_cmd, sizeof(shell_cmd), "route add default gw %d.%d.%d.%d dev %s metric 0", gw[3], gw[2], gw[1], gw[0], ifname);
ql_system(shell_cmd);
//Adding DNS
if (profile->ipv4.DnsSecondary == 0)
profile->ipv4.DnsSecondary = profile->ipv4.DnsPrimary;
if (dns1[0]) {
dbg_time("Adding DNS %d.%d.%d.%d %d.%d.%d.%d", dns1[3], dns1[2], dns1[1], dns1[0], dns2[3], dns2[2], dns2[1], dns2[0]);
snprintf(shell_cmd, sizeof(shell_cmd), "echo -n \"nameserver %d.%d.%d.%d\nnameserver %d.%d.%d.%d\n\" > /etc/resolv.conf",
dns1[3], dns1[2], dns1[1], dns1[0], dns2[3], dns2[2], dns2[1], dns2[0]);
system(shell_cmd);
}
}
if (profile->ipv6.Address[0] && profile->ipv6.PrefixLengthIPAddr) {
unsigned char *ip = (unsigned char *)profile->ipv6.Address;
#if 1
snprintf(shell_cmd, sizeof(shell_cmd), "ifconfig %s inet6 add %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x/%d",
ifname, ip[0], ip[1], ip[2], ip[3], ip[4], ip[5], ip[6], ip[7], ip[8], ip[9], ip[10], ip[11], ip[12], ip[13], ip[14], ip[15], profile->ipv6.PrefixLengthIPAddr);
#else
snprintf(shell_cmd, sizeof(shell_cmd), "ip -6 addr add %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x/%d dev %s",
ip[0], ip[1], ip[2], ip[3], ip[4], ip[5], ip[6], ip[7], ip[8], ip[9], ip[10], ip[11], ip[12], ip[13], ip[14], ip[15], profile->ipv6.PrefixLengthIPAddr, ifname);
#endif
ql_system(shell_cmd);
snprintf(shell_cmd, sizeof(shell_cmd), "route -A inet6 add default dev %s", ifname);
ql_system(shell_cmd);
}
return;
}
#endif
/* Do DHCP using busybox tools */
{
char udhcpc_cmd[128];
pthread_attr_t udhcpc_thread_attr;
pthread_t udhcpc_thread_id;
pthread_attr_init(&udhcpc_thread_attr);
pthread_attr_setdetachstate(&udhcpc_thread_attr, PTHREAD_CREATE_DETACHED);
if (profile->ipv4.Address) {
#ifdef USE_DHCLIENT
snprintf(udhcpc_cmd, sizeof(udhcpc_cmd), "dhclient -4 -d --no-pid %s", ifname);
dhclient_alive++;
#else
if (access("/usr/share/udhcpc/default.script", X_OK)) {
dbg_time("Fail to access /usr/share/udhcpc/default.script, errno: %d (%s)", errno, strerror(errno));
}
//-f,--foreground Run in foreground
//-b,--background Background if lease is not obtained
//-n,--now Exit if lease is not obtained
//-q,--quit Exit after obtaining lease
//-t,--retries N Send up to N discover packets (default 3)
snprintf(udhcpc_cmd, sizeof(udhcpc_cmd), "busybox udhcpc -f -n -q -t 5 -i %s", ifname);
#endif
#if 1 //for OpenWrt
if (!access("/lib/netifd/dhcp.script", X_OK) && !access("/sbin/ifup", X_OK) && !access("/sbin/ifstatus", X_OK)) {
dbg_time("you are use OpenWrt?");
dbg_time("should not calling udhcpc manually?");
dbg_time("should modify /etc/config/network as below?");
dbg_time("config interface wan");
dbg_time("\toption ifname %s", ifname);
dbg_time("\toption proto dhcp");
dbg_time("should use \"/sbin/ifstaus wan\" to check %s 's status?", ifname);
}
#endif
#ifdef USE_DHCLIENT
pthread_create(&udhcpc_thread_id, &udhcpc_thread_attr, udhcpc_thread_function, (void*)strdup(udhcpc_cmd));
sleep(1);
#else
pthread_create(&udhcpc_thread_id, NULL, udhcpc_thread_function, (void*)strdup(udhcpc_cmd));
pthread_join(udhcpc_thread_id, NULL);
if (ql_raw_ip_mode_check(ifname)) {
pthread_create(&udhcpc_thread_id, NULL, udhcpc_thread_function, (void*)strdup(udhcpc_cmd));
pthread_join(udhcpc_thread_id, NULL);
}
#endif
#ifdef QL_OPENWER_NETWORK_SETUP
ql_openwrt_setup_wan(ifname, &profile->ipv4);
#endif
}
if (profile->ipv6.Address[0] && profile->ipv6.PrefixLengthIPAddr) {
#if 1
//module do not support DHCPv6, only support 'Router Solicit'
//and it seem if enable /proc/sys/net/ipv6/conf/all/forwarding, Kernel do not send RS
const char *forward_file = "/proc/sys/net/ipv6/conf/all/forwarding";
int forward_fd = open(forward_file, O_RDONLY);
if (forward_fd > 0) {
char forward_state[2];
read(forward_fd, forward_state, 2);
if (forward_state[0] == '1') {
//dbg_time("%s enabled, kernel maybe donot send 'Router Solicit'", forward_file);
}
close(forward_fd);
}
snprintf(shell_cmd, sizeof(shell_cmd), "ip -%d address add %s/%u dev %s",
6, ipv6Str(profile->ipv6.Address), profile->ipv6.PrefixLengthIPAddr, ifname);
ql_system(shell_cmd);
//ping6 www.qq.com
snprintf(shell_cmd, sizeof(shell_cmd), "ip -%d route add default via %s dev %s",
6, ipv6Str(profile->ipv6.Gateway), ifname);
ql_system(shell_cmd);
if (profile->ipv6.DnsPrimary[0] || profile->ipv6.DnsSecondary[0]) {
char dns1str[64], dns2str[64];
if (profile->ipv6.DnsPrimary[0]) {
strcpy(dns1str, ipv6Str(profile->ipv6.DnsPrimary));
}
if (profile->ipv6.DnsSecondary[0]) {
strcpy(dns2str, ipv6Str(profile->ipv6.DnsSecondary));
}
update_resolv_conf(6, ifname, profile->ipv6.DnsPrimary[0] ? dns1str : NULL, profile->ipv6.DnsSecondary ? dns2str : NULL);
#ifdef QL_OPENWER_NETWORK_SETUP
ql_openwrt_setup_wan6(ifname, &profile->ipv6);
#endif
}
#else
#ifdef USE_DHCLIENT
snprintf(udhcpc_cmd, sizeof(udhcpc_cmd), "dhclient -6 -d --no-pid %s", ifname);
dhclient_alive++;
#else
/*
DHCPv6: Dibbler - a portable DHCPv6
1. download from http://klub.com.pl/dhcpv6/
2. cross-compile
2.1 ./configure --host=arm-linux-gnueabihf
2.2 copy dibbler-client to your board
3. mkdir -p /var/log/dibbler/ /var/lib/ on your board
4. create /etc/dibbler/client.conf on your board, the content is
log-mode short
log-level 7
iface wwan0 {
ia
option dns-server
}
5. run "dibbler-client start" to get ipV6 address
6. run "route -A inet6 add default dev wwan0" to add default route
*/
snprintf(shell_cmd, sizeof(shell_cmd), "route -A inet6 add default %s", ifname);
ql_system(shell_cmd);
snprintf(udhcpc_cmd, sizeof(udhcpc_cmd), "dibbler-client run");
dibbler_client_alive++;
#endif
pthread_create(&udhcpc_thread_id, &udhcpc_thread_attr, udhcpc_thread_function, (void*)strdup(udhcpc_cmd));
#endif
}
}
}
void udhcpc_stop(PROFILE_T *profile) {
char *ifname = profile->usbnet_adapter;
char shell_cmd[128];
ql_set_driver_link_state(profile, 0);
if (profile->qmapnet_adapter) {
ifname = profile->qmapnet_adapter;
}
#ifdef USE_DHCLIENT
if (dhclient_alive) {
system("killall dhclient");
dhclient_alive = 0;
}
#endif
if (dibbler_client_alive) {
system("killall dibbler-client");
dibbler_client_alive = 0;
}
//it seems when call netif_carrier_on(), and netcard 's IP is "0.0.0.0", will cause netif_queue_stopped()
snprintf(shell_cmd, sizeof(shell_cmd), "ifconfig %s 0.0.0.0", ifname);
ql_system(shell_cmd);
snprintf(shell_cmd, sizeof(shell_cmd), "ifconfig %s down", ifname);
ql_system(shell_cmd);
#ifdef QL_OPENWER_NETWORK_SETUP
ql_openwrt_setup_wan(ifname, NULL);
ql_openwrt_setup_wan6(ifname, NULL);
#endif
}